Definitions by Twatfacekilla326

Shark Fin 

When ones penis tip protrudes through a hole in their underwear or clothing, either accidental or on purpose, resembling a shark fin cresting the surface of the ocean.

Tim's rush to leave the bathroom left his penis tip dangling from his open fly, revealing his shark fin to the entire office.

Shark Fin by Twatfacekilla326 December 30, 2015